package com.itheima.test2;

public class StringBuilderDemo3 {
    public static void main(String[] args) {
        // 数组转字符串
        int[] arr = {1, 2, 3};
        String str = arrToString(arr);
        System.out.println(str);
    }

    // 定义方法
    public static String arrToString(int[] arr) {
        StringBuilder sb = new StringBuilder();
        sb.append("[");

        for (int i = 0; i < arr.length; i++) {
            if (i == arr.length - 1) {
                sb.append(arr[i]);
            } else {
                sb.append(arr[i]).append(", ");
            }
        }
        sb.append("]");

        return sb.toString();
    }


}
